package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.properties.JwtProperties;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;
import java.util.Objects;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;


    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        String s = DigestUtils.md5DigestAsHex(password.getBytes());
        // TODO 后期需要进行md5加密，然后再进行比对
        password=DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (Objects.equals(employee.getStatus(), StatusConstant.DISABLE)) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();

        BeanUtils.copyProperties(employeeDTO,employee);

        employee.setStatus(StatusConstant.ENABLE);

        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //操作人和更新人
//        Long currentId = BaseContext.getCurrentId();
//        employee.setCreateUser(currentId);
//        employee.setUpdateUser(currentId);

        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        employeeMapper.save(employee);

    }

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO dto) {
        //这会在执行后续的 SQL 查询时，自动处理分页逻辑（即限制查询结果的数量和偏移量）。
        PageHelper.startPage(dto.getPage(),dto.getPageSize());
        //因为已经调用了 PageHelper.startPage，所以查询结果会被自动分页，返回的是一个 Page 对象，里面包含了查询结果和分页信息。
        //page对象是一个List

        Page<Employee> page =  employeeMapper.pageQuery(dto);
        PageResult pageResult = new PageResult();
        pageResult.setRecords(page.getResult());
        pageResult.setTotal(page.getTotal());

        return pageResult;
    }

    @Override
    public boolean changeStatus(int status, Long id) {
        Employee employee = Employee.builder().status(status)
                .id(id).build();
        employeeMapper.updateInfo(employee);
        return true;
    }

    @Override
    public Employee findById(Long id) {
        return employeeMapper.findById(id);
    }

    @Override
    public void updateEmployeeInfo(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.updateInfoXml(employee);
    }

}
